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JPH08316884A |
PURPOSE: To improve the converging speed of a filter coefficient by updating the filter coefficient based on a sign of difference-data, an updated amount of the filter coefficient and identification recovery data. CONSTITUTION: An update...
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JPH08314472A |
PURPOSE: To provide a noise removal system capable of directly removing a noise signal and preventing the deterioration in communication quality due to the effect of an ambient noise. CONSTITUTION: A microphone 1 always fetches the ambie...
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JPH08316882A |
PURPOSE: To optimize a frequency characteristic or the like with a simple configuration by weighting a product between error data and input data, summing the weighted products cyclicly and updating a coefficient with an evaluation value ...
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JPH08315511A |
PURPOSE: To lower the required S/N ratio by optimizing a judgement slice being employed in two input judgement including the adjacent bit information. CONSTITUTION: A two input judgement unit 108 employs any one of Figures B-E at the jud...
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JPH08316883A |
PURPOSE: To prevent update of an unexpected tap gain with respect to Gaussian noise by applying update control to the tap gain of the adaptive automatic equalizer. CONSTITUTION: An equalizer output Yk is given to a discrimination device ...
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JP2558108B2 |
PCT No. PCT/GB85/00580 Sec. 371 Date Aug. 12, 1986 Sec. 102(e) Date Aug. 12, 1986 PCT Filed Dec. 12, 1985 PCT Pub. No. WO86/03594 PCT Pub. Date Jun. 19, 1986.In an image processing system for elimination of speckle a signal derived from ...
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JP2558445B2 |
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JPH08307322A |
To reduce the complexity of the hardware of an initial phase loading circuit by providing a signal coupling component which adapts itself so that the component may be coupled with a fractionally-spaced linear equalizer with a specific co...
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JPH08307283A |
PURPOSE: To estimate a maximum likelihood series with soft discrimination regardless of the modulation method in the case of using the device for an equalizer or the like of a receiver. CONSTITUTION: A Viterbi algorithm processing sectio...
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JPH08307382A |
To provide a system and a method for receiving spread spectrum radio signals propagated through multipath environment, such as the digital modulated signal of a code division multiple access communication system. A rake receiver 10 used ...
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JPH08307211A |
To lighten the calculation neck at the time of applying the relaxed look-ahead technology by constituting a pipelined adaptive infinite impulse responding(PAIIR) filter of adaptive sections and a nonadaptive section. A PAIIR filter 10 co...
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JPH08305372A |
PURPOSE: To actively reduce sounds in proximity to a window through which sound penetrates in or out by generating canceling sound and controlling so as to minimize interfering sound with the noise. CONSTITUTION: A noise source microphon...
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JPH08305371A |
PURPOSE: To make a final estimation error constant regardless of the degree of a projection. CONSTITUTION: A transfer function of the unknown system 11 is estimated from a projection algorithm by performing a convolution operation on an ...
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JP2555939B2 |
PURPOSE: To reduce the quality degradation of sound signals due to mechanical modulation. CONSTITUTION: When external vibration is detected, the small-sized piezoelectric vibration gyro 31 of an external vibration detection part 3 output...
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JP2556195B2 |
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JPH08298700A |
PURPOSE: To provide a sound image control device capable of giving a feel of pseudo stereophonic sound without causing a feeling of the opposite phase and causing deflection of a sound image even if a low frequency filter is used. CONSTI...
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JPH08297493A |
PURPOSE: To generate a reference signal which simplifies the processing of adaptive filters. CONSTITUTION: In the silencing system which processes an adaptive filter 300 so as to form signals silencing noises by inputting periodic signal...
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JP2551171B2 |
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JP2551080B2 |
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JP2551235B2 |
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JP2551231B2 |
A decision feedback equalizer for equalizing a received analog baseband signal (l) has a gain control circuit (ll) which compresses the amplitude of the baseband signal (l) to l/K (K >/= l). The compressed signal is converted to a digita...
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JP2551183B2 |
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JP2551869B2 |
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JP2551210B2 |
An adaptive equalizer for adaptively equalizing a signal received over a channel on which intersymbol interference occurs. The adaptive equalizer accurately updates the tap coefficients of a transversal filter incorporated therein in a p...
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JPH08510606A |
Circuitry and concomitant methodology for demodulating Direct-Sequence, Spread-Spectrum Code-Division Multiple-Access (DS/SS CDMA) channel signal using multiple samples per transmitted symbol and a minimum mean squared error criterion to...
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JPH08294195A |
PURPOSE: To reduce fluctuation width of an amplitude characteristic more than the width before a correction even if a speaker is changed into a different individual of the same kind by having a constitution that the correction specified ...
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JPH08293823A |
PURPOSE: To inexpensively provide a variable resonance type equalizing device in which equalization precision is improved by using the detection level of a band pass filter installed in a transmission band without using CPU for controlli...
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JPH08292771A |
PURPOSE: To eliminate the noise of a low frequency area due to resonance of an automotive body. CONSTITUTION: An acceleration pickup 1A is provided on a door hinge part whose strength is considerably high from the structural viewpoint of...
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JPH08293815A |
To realize a further light and small package and a further long communicating time by using a CPU or plural co-processors for obtaining a communicating function. When the outputs of a CPU 58 and a co-processor KPC 72 are stored in a memo...
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JPH08289390A |
PURPOSE: To obtain a considerable howling margin to make satisfactory acoustic circumstances by neutralizing the acoustic coupling from a speaker to a microphone in an acoustic system by equivalent simulated characteristics. CONSTITUTION...
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JPH08287608A |
PURPOSE: To increase the accuracy of judgement and to reduce equalization error. CONSTITUTION: This method is the method for detecting maximum likelihood of a convolution code Yn obtained by connecting a transversal equalizer to a code Z...
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JPH08286675A |
PURPOSE: To simplify a constitution by using an adaptive filter for timbre control of noises. CONSTITUTION: A target signal having a desired frequency spectrum is inputted to a noise control device provided with a loudspeaker 4 outputtin...
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JPH08288890A |
To enable the use of corrected least square averaging method for periodically updating the value of the tap of finite impulse (FIR) filter as the group of taps in the characteristic evaluation of FIR filter. Concerning the tap updated co...
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JP2545993B2 |
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JP2546022B2 |
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JP2547782B2 |
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JP2545614B2 |
A system of the transversal type automatic equalizer with a tap coefficient protection in which inter-symbol interference is prevented includes a summing unit (51) for summing all of the tap powers detected by a tap power detecting unit ...
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JP2546014B2 |
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JPH08279731A |
PURPOSE: To provide a three-tap transversal filter by which amplitude equalization and phase equalization can be performed even with one delay circuit equipment by providing a buffer for input signal, a delay circuit for delaying the out...
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JPH08279247A |
PURPOSE: To enable the use of an MR head which outputs vertically asymmetrical reproduced signal waveforms by correcting the vertically asymmetrical reproduced signal waveforms reproduced from a recording medium. CONSTITUTION: The MR hea...
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JPH08274586A |
To reduce a delay in the sub-band processing unit for an audible frequency signal. First filters of a prescribed number each having a predetermined 1st frequency pass band and each acting as a minimum phase filter in an analysis filter b...
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JPH08274688A |
PURPOSE: To select the optimum filter coefficient most approximating the inverse characteristic of the frequency characteristic or a transmission line usd in a digital data transmission system by giving the filter coefficient, which corr...
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JPH08272377A |
PURPOSE: To provide a noise reducing device capable of obtaining a large and stable noise reduction effect and evading enlargement is size and increase in weight of a camcoder. CONSTITUTION: When a sensor 7 detects a signal deeply correl...
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JPH08272374A |
PURPOSE: To provide an inexpensive active muffler by simplifying control in its control part even when plural ducts exist. CONSTITUTION: A first duct 4 between two ducts 4, 5 having nearly equal cross- sectional shapes is provided with a...
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JPH08274690A |
To attain detection of a near-end speech signal even under a low S/N environment by deciding a mean power of an acoustic echo canceller output signal over a prescribed sampling time in response to a received transmission signal and an ou...
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JP2544527B2 |
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JP2544842B2 |
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JPH08265225A |
To guarantee optimum line adaptation in the method of all operations by obtaining the echo attenuation of an adaptive filter and a main filter from signals supplied to the respective input terminals of a transfer controller and supplying...
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JPH08265208A |
PURPOSE: To provide a noise canceller capable of easily performing the elimination of noise with high suppression effects without using a Kalman filter with a lot of calculation amount. CONSTITUTION: This noise canceller is provided with...
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JPH08265224A |
PURPOSE: To eliminate nuisance to an opposite equipment and to perform correct echo estimation without being influenced by reception signals at the time of the training of an echo canceller. CONSTITUTION: When it is detected that no rece...
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